| abstract |
A semiconductor device includes a substrate, first strain-inducing source and drain structures, a first gate structure, a first channel region, second strain-inducing source and drain structures, a second gate structure, and a second channel region. At least one of the first strain-inducing source and drain structures has a first proximity to the first channel region. At least one of the second strain-inducing source and drain structures has a second proximity to the second channel region. The second closeness is different from the first closeness. |